Abstract
A Thomson scattering diagnostic designed to measure both edge and core physics has been implemented on MAST. The system uses eight Nd:YAG lasers, each with a repetition rate of 30 Hz. The relative and absolute timing of the lasers may be set arbitrarily to produce fast bursts of measurements to suit the time evolution of the physics being studied. The scattered light is collected at F/6 by a 100 kg six element lens system with an aperture stop of 290 mm. The collected light is then transferred to 130 polychromators by 130 independent fiber bundles. The data acquisition and processing are based on a distributed computer system of dual core processors embedded in 26 chassis. Each chassis is standalone and performs data acquisition and processing for five polychromators. This system allows data to be available quickly after the MAST shot and has potential for real-time operations.
| Original language | English |
|---|---|
| Article number | 10D520 |
| Journal | Review of Scientific Instruments |
| Volume | 81 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2010 |
| Externally published | Yes |
Funding
This work was funded partly by the United Kingdom Engineering and Physical Sciences Research Council under Grant No. P/G003955 and the European Communities under the Contract of Association between Euratom and CCFE. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was carried out within the framework of the European Fusion Development Agreement. This work was also partly funded by the University of York and the Northern Way. The author would like to acknowledge the help of the very many people who contributed to this project in the MAST Team.